FR2533886A1 - DEVICE FOR FILLING BAGS - Google Patents

Abstract

BAG FILLING DEVICE MADE OF A BEARING EXTERIOR BAG AND AN INTERNAL PLASTIC SHEET BAG. ON THE PIPE 19 OR THE FILLING HOPPER 18 ARE PROVIDED WITH SWIVEL ARMS 27, CARRYING TIGHTENING ELEMENTS AND WHICH HAVE THE ROLE OF BLOCKING THE OPENING EDGES OF THE INTERIOR BAG 28. THE LATERAL PLIES OF THE EXTERIOR BAGS ARE SWIVELY MOUNTED ON SUPPORTS 4, 5 WHICH RISE AND LOWER IN THE RACK 1 UNDER THE ACTION OF CYLINDERS 23 WHICH LOWER THE BAGS DURING FILLING AND DEPOSIT THEM ON THE CONVEYOR. APPLICATION IN PARTICULAR TO THE FILLING OF LARGE CAPACITY BAGS.

Description

The invention relates to a bag filling device consisting of a

  outer carrier bag with side folds and seal lines of head and bottom, which is

  provided at its filling end with notches or slots

  the inner folding edges of the side folds and. a notch parallel to these, passing in the middle of the line of head seal and side walls, and by an inner bag of plastic sheet with side folds, open

  top, arranged in the outer bag, the device in ques-

  a filling hopper arranged in a carrier, clamping devices for grasping and clamping the bags and a conveyor supporting the filled and discharging bags. For reasons of economy, it is increasingly used for the packaging of powdery or freely castable products of large bags which consist of a waterproof inner bag made of plastic sheet and a carrying outer bag, preferably made of strips of

plastic material stretched.

  DE-OS 28 50 668 discloses a device for filling it

  wise of large capacity bags with which the bag is tight

  against a bag holder below the filling hopper.

  ge; during filling, the bag is deposited on a support in the form of the force transducer of a

  scale, and before the filling is completed, the

  bag stain is lowered enough so that the wall of the

  bag relaxes in the vicinity of the filling opening.

  However, because of the high weight, a particular problem in filling the high capacity bags is that of securing these bags in a secure manner to a filler neck.

  high weight, high-capacity bags need to be

  feel in such a form that after filling, they can in a simple way transport them using conveyor means, as far as possible without additional devices. A large capacity bag that can be transported in a simple manner is constituted by an outer carrying bag, provided with lateral folds and lines of head and bottom joint, which is provided at its filling end with notches or slots opening the inner folding edges of the side folds, and a notch parallel thereto, passing through the middle of the head seal line and the side walls, and by a plastic sheet bag open at the top, provided with folds - side, arranged in the outer bag With such a bag one can,

  after having stretched by opening the median notch of the bag ex-

  inside, fill and close the inner bag, then the open side folds in their upper part by notches

  or slots form two legs of transport by means of

  bag may be suspended from hooks or

positive carriers.

  It is an object of the invention to provide a bag filling device as described above wherein the filler neck is relieved of the weight of the bag and wherein

  however, after being fully stretched and completely

  fold, the bag can be automatically deposited on a support

  or similar element while the upper part is relieved

re of the bag.

  This result is obtained according to the invention with a device

  of the type described at the beginning by the fact that on the filling pipe or the filling hopper are provided

  arms carrying clamping elements, which may be

  they are pivoting, intended to keep tight the edges

  -25 opening of the inner bags, and that there are plans for

  crescent-shaped grippers, engaging through the slots of the outer bags formed in the side folds, which are pivotally mounted on support members which are guided in the frame and raise and lower under

  the action of hydraulic cylinders, which lower the bags

  filling until they rest on the conveyor.

  Claw-shaped gripping claws are introduced

  by pivoting in the legs formed by the folds la-

  the outer bag opened by notches, and can come out as easily and carry the outer bag

  by letting it rest on the frame so that the tubular

  lure filling filling the inner bag is relieved

the weight of the bag.

  According to a development of the invention, it is provided that the support elements disposed on the opposite sides of the bag are articulated to two parallel guide rods or pairs of parallel guide rods arranged one to the

  above the other, the other ends of which are mounted

  in the frame, that in the support elements, hook or crescent-shaped gripping claws are pivotally mounted in opposite directions about parallel axes

  between them and that hydraulic cylinders are provided to

  rotate the parallel rods and grab claws.

  According to another development of the invention, for which it is claimed an independent protection, it is expected that the arms carrying the clamping elements are constituted

  by levers pivotally mounted on a circumferential line

  filling pipe or filling hopper

  spring-loaded ring which, when moving a ring mounted to slide axially on the tubing or hopper by encircling it, is applied and pressed against it by said ring. Thanks to the fact that a tumbling ring is engaged over the spaced apart levers, these are, in a very simple way, clamped against the outer surface of the tubing or the filling hopper, at the same time as blocking

  the filling end of the inner bag against this

face.

  The features and advantages of the invention

  will, moreover, from the description-which will follow as

  for example, with reference to the appended drawing in which:

  Figure 1 is a schematic side elevational view of

  FIG. 2 is a view from the front of the device according to FIG. 1; Figure 3 is a sectional view of the device along the line A-B of Figure 1; FIG. 4 is a longitudinal sectional view of the

  filling hopper with clamping arms now

the opening of the bag.

  The filling hopper of the device for filling

  The sacks are arranged with clamping devices and support for the bag on a frame-shaped frame 1, as shown in FIGS. 1 and 2. In the frame 1, two U-shaped parallel guide rods 2 are pivotally mounted. and 3 The legs of the U-shaped parallel guide rods are fixedly connected to plateletsupports 4, 5 which themselves bear U-shaped support elements 6, 7. The arms of these support elements have holes through which the pivot arm ends 8, 9 are engaged and are axially displaced by means of abutment rings 10, 11 on one of the bent pivot arms,

  know the pivoting arm 9, acts via a le-

  12 a hydraulic cylinder which, by its cylinder, is pivotally attached to a plate 14, which is itself secured to the

  support plate 5 Through a coupling linkage

  15 connected to the pivoting arm elbow 9, the movement of rotation

  tion imposed on the pivoting arm 9 by the cylinder 13 is transmitted to the pivoting arm 8 In addition, there are provided strippers

  16, 17 fixedly connected to the support plates 4 and 5.

  For filling a large bag with outer bag carrying and inner bag, we start by suspending the inner bag to the outer supports 18 of the hopper.

  filling which surrounds the filling pipe 19 clean-

  at a certain distance from it. The fastening and clamping device for the inner bag will be described

  in detail below with reference to FIG.

  After hooking of the filling opening of the inner bag, the outer bag is lifted Under the action of the hydraulic cylinder 13, the pivoting arms bent 8, 9 pivot

  inwards and the two loops formed by the two

  your clothes in the outer bag are hung by hand

  pivoting arms so that they carry the outer bag

  The outer bag is applied by its wall, which can be seen in Figure 1, against two pins 20 provided on the outer supports 18 of two opposite sides, so that this outer bag is slightly stretched in the area of In this state, the suspended large capacity bag is at a short distance from the belt conveyor 21 As soon as filling material exiting the

  filling pipe 19 falls into the bag of large capacity

  cited 22, the bag lowers, as soon as the bottom has taken its configu-

  ration under the weight of de-filling material, on-train

  of belt rollers 21, then the filling ends up

  To be able to lower the bag according to the

  When filling is completed, the cylinder 23 connected to the lower parallel guide rod 3 is provided with an expansion valve. When the filling is complete, the piston rod of the cylinder 23 is removed so that no more When this operation is completed, the jack 13 is actuated and the angled pivoting arms 8, 9 are

  out of the two slits of the outer bag of the large capacity bag.

  The tightening of the inner bag on the filling tubing

  sage 19 and the outer supports 18 is also loose.

  Then, by means of the jack 23, the entire device is

  returned to the basic position shown in Figure 2.

  An additional gas pressure spring 24 serves to keep the entire device in this position.

  if the pressure for the cylinder 23 runs out.

  Since the support plates 4, 5 describe an arc of a circle during their lowering movement, the position

  semi-circular gripping claws with respect to the ex-circular bag

  In this case, the semi-circular gripping claws 25, 26 are connected to the pivoting arms 8, 9.

  bent with hinge 27 ', 28' not shown.

  FIG. 4 shows the outer hopper 18 as well as the inner filler pipe 19 at more

  It can be seen from this figure that

  two outwardly directed spring levers 27 are disposed on the periphery of the outer tubing 18, in its lower part The lower bag 28 is engaged over the outer tubing 18 Then, under the action of the cylinder 19 whose cylinder is attached to the outside on the tubing 18, a ring 30 surrounding the outer tubing 18 at a small distance is moved down and during its movement it

  apply and tighten the clamping lever 27

  the outer tubing, which is followed by applying and securely hold the inner bag 28 against the tubing

outside 18.

  To facilitate the engagement of the inner bag 28 on the tubing 18, wire stirrups 31, 32 arranged in a cross are connected to the lower end of the outer tubing 18 to guide the ring which clamps the levers of

  tightening against the tubing 18, this ring has pins

  33 guides protruding upward which are mounted in

  guide bushes 34 which are attached to the manifold 18.

  As shown in Figure 1, the outer pipe 18 has an opening 35 to which is connected a pipe

  36 This duct 36 may be connected to a ventilator

  aspirator 37 or blower 38 The ventilator

  aspirator 37 serves to suck the dust while the

  fan blower 38 serves to inflate the inner bag sus-

hanging from the hopper 18.

Claims (12)

  1 bag filling device consisting of an outer bag carrying, provided with lateral and lines of   head and bottom seal, which is provided at its end with   pleating nicks or slots opening the folding edges   side folds and a notch parallel to it not-   by the middle of the line of head gasket and walls   sides, and an inner bag made of plastic sheet,   green at the top, with side folds, arranged in this outer bag   this device has a filling hopper dis-   placed in a support frame, clamping devices for   seize and tighten the bags, and a conveyor supporting and   filling the filled bags, characterized in that on the filling pipe (19) or the filling hopper pipe (18), at a certain distance this pipe is provided arms (27) carrying clamping elements, pivotable against the filler neck intended to block the opening edges of the inner sacks (28), and in that crescent-shaped gripping claws (25, 26) which pass through slots in the outer sacks are provided formed in the side folds and being pivotally mounted on support members (4, 5) which are guided in the frame (1)   and rise and fall under the action of hydraulic cylinders   (23) which, during filling, lower the bags   until they rest on the conveyor (21).   2 Device according to claim 1, characterized in that   that the support elements (4, 5) arranged on two sides oppo-   Sections of the bag are articulated respectively to two parallel guide rods or pairs of parallel guide rods (2, 3) whose other ends are pivotally mounted in   the frame (1), in that, in the support elements, are   pivoting heads in opposite directions about axes parallel to each other hook-shaped gripping claws (25, 26) and that hydraulic jacks (13) are provided for   rotate the parallel guide rods (2, 3).   3 Device according to claim 1 or 2, characterized in that the gripping claws (25, 26) are attached to   shafts (8, 9), one of which carries a lever (12) to which   one end of the hydraulic cylinder (13) pivotally mounted at its other end to the support element (5, 14), and in that the shafts (8, 9) are provided with levers (15) which are   articulated to a coupling rod (15 ') for pivoting reverse.   4 Device according to any one of the claims   1 to 3, characterized in that the gripping claws are con-   staggered by arcuate curved rods attached to levers, which are arranged concentrically at their axis pivoting.   Device according to any of the claims   1 to 4, characterized in that the gripping claws (25, 26) are connected to the shafts (8, 9) by hinges (27, 28)   with a substantially vertical pivot axis.   Device according to any one of claims 1   to 4, characterized in that pegs (20) acting laterally   on the outer bag and extending its upper   are arranged, shifted by 90 relative to the prongs   (25, 26) on the filler pipe or filling hopper (18) below the claw line clamshell.   7 Device according to any one of claims 1   to 6, characterized in that springs (24) are provided   the parallel guide rods (2, 3) in the direction from their high position.   8 Device according to any one of claims 1   to 7, characterized in that, for lowering the bags being filled, the hydraulic cylinders (23) whose function is to rotate the parallel guide rods (2, 3) are equipped with reduction valves.   9 Device, in particular according to claim 1, characterized in that the arms (27) carrying the clamping elements are constituted by levers pivotally mounted on a circumferential line of the filling pipe or the   fill hopper tubing (18) and pushed out   spring force that can be applied and   against the hopper or the pipe by a ring (30) encircling   these and sliding on them in the axial direction.   Device according to claim 9, characterized in that the ring (30) is provided with rods (33) parallel to its generator which are guided in guide elements'   (34) provided with holes, attached to the tubing or pipe.   Apparatus according to claim 9 or 10, characterized   in that a hydraulic cylinder (29) is provided for sliding the ring.